Malicious PDF — malware analysis report

Static analysis result for SHA-256 946a6357bca78a15…

MALICIOUS

PDF

82.2 KB Created: 2021-04-07 02:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d14e4b60f6f4f01ba7c9ce1558dfcf09 SHA-1: 7a472502c334e7145223fc40e1ae9293a2d43b9f SHA-256: 946a6357bca78a15bd5d5bca95cfb2beedfd68023bab2abd28745de3cf811829
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to direct users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/strik?utm_term=bbg+kayla+itsines PDF link annotation
    • http://belkwigs.com/runes_of_magic_system_requirementstqq97.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/miaDeg7/modern_history_spectrum_book_price.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/ff7a0a2efe85b.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/2020_catholic_daily_bible_reading_guide5hcx3.pdfIn PDF document text
    • https://walowopus.weebly.com/uploads/1/3/5/2/135295279/goxosodifokovek-boxijivotex-nugakunu.pdfIn PDF document text
    • https://cdn.sqhk.co/muribirigim/icegigi/bubble_pop_origin_level_83.pdfIn PDF document text
    • http://azorocheat1.xyz/f4_not_working_in_excel_hpl9o6d.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/sisomajates.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/70c28145fb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/gjZ1geo/vusalu.pdfIn PDF document text
    • https://lomelamul.weebly.com/uploads/1/3/5/9/135994015/8200199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/47141aa9-c891-49ee-a978-3351f0328f14/spektrum_ar8000_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aed1310-9fb9-46c4-932b-0aa2038e693e/why_my_dell_laptop_battery_is_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79cef0f2-7134-4b0f-8005-3225c6b61c48/39195767454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bb2763-aa85-4889-8474-93498baec976/makowakumujefig.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_13571399d9b747b7b1bbcc5083ee3f10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4865fc69-eaa7-44ac-8357-d9ca5518e3b9/proform_le_tour_de_france_exercise_bike_canada.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_6ab9a3e52fa0476eb90d313b64c417dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6556a4-bc0b-48e1-b42e-27f963236411/75872910050.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 4792 bytes
SHA-256: c5683fcae466357b84eae4c227a6c17fe774ad2e3bf5fe880a2d5276119e267c
font_01_sfnt_off0001078d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078D 11176 bytes
SHA-256: 4458aff0f21a69d6d5355d59a9306fac42ac536f88522756e0cce255e396a6af
font_02_sfnt_off00012dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71